/Engine/Source/Runtime/Messaging/Public/IMessageBus.h
Unsubscribe
virtual [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [IMessageSubscription](API\Runtime\Messaging\IMessageSubscription), ESPMode::ThreadSafe > Subscribe ( const [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [IMessageReceiver](API\Runtime\Messaging\IMessageReceiver), ESPMode::ThreadSafe > & Subscriber, const [FName](API\Runtime\Core\UObject\FName) & MessageType, const [TRange](API\Runtime\Core\Math\TRange)< EMessageScope > & ScopeRange )